The 11th Hour is a 2007 environmental documentary film produced, directed and narrated by Leonardo DiCaprio. The film was released one year after Al Gore's "An Inconvenient Truth." Over 50 politicians, environmental activists and scientists address issues facing the planet's life systems including global warming, deforestation, species depletion and habitat extinction. Experts in their respective fields including Stephen Hawking, Sylvia Earle, William McDonough, David Suzuki and Andy Lipkis offer their ideas about potential solutions to the earth's environmental problems. The film's premise suggests that the earth and future of humanity is in jeopardy, and restorative action can only be achieved through technology, social responsibility and conservation. The experts stress that everyone on the planet has a responsibility to help reverse climate change. This means using more wood but using less substances like concrete, steel and plastic, which emit heavy doses of carbon when they are produced. It is only through these means that the planet can begin to heal itself.